12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving started: time spend (152), score (null), new best score (null), random seed (0).
Exception in thread "main" Exception executing consequence for rule "requiredCpuPowerTotal" in com.swa.planner.domain.rule: java.lang.NullPointerException
at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
at org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177)
at org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92)
at org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120)
at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136)
at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)
at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82)
at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65)
at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
at com.swa.planner.domain.CloudTest.main(CloudTest.java:67)
Caused by: java.lang.NullPointerException
at java.lang.String.<init>(Unknown Source)
at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)
at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)
at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
at org.mvel2.MVEL.compileExpression(MVEL.java:810)
at org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435)
at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)
at org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206)
at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190)
at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)
at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
at org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38)
at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204)
at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245)
at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210)
at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205)
at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14)
at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown Source)
at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown Source)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
... 14 more
package com.swa.planner.domain;
import org.drools.planner.api.domain.entity.PlanningEntity;
import org.drools.planner.api.domain.variable.PlanningVariable;
import org.drools.planner.api.domain.variable.ValueRange;
import org.drools.planner.api.domain.variable.ValueRangeType;
import org.drools.planner.examples.common.domain.AbstractPersistable;
@PlanningEntity(difficultyComparatorClass = CloudProcessDifficultyComparator.class)
public class CloudProcess extends AbstractPersistable{
private int requiredCpuPower;
private int requiredMemory;
private int requiredNetworkBandwidth;
private CloudComputer computer;
public CloudProcess(long id, int requiredCpuPower, int requiredMemory,
int requiredNetworkBandwidth) {
super();
setId(id);
this.requiredCpuPower = requiredCpuPower;
this.requiredMemory = requiredMemory;
this.requiredNetworkBandwidth = requiredNetworkBandwidth;
}
public CloudProcess() { }
public int getRequiredCpuPower() {
return requiredCpuPower;
}
public void setRequiredCpuPower(int requiredCpuPower) {
this.requiredCpuPower = requiredCpuPower;
}
public int getRequiredMemory() {
return requiredMemory;
}
public void setRequiredMemory(int requiredMemory) {
this.requiredMemory = requiredMemory;
}
public int getRequiredNetworkBandwidth() {
return requiredNetworkBandwidth;
}
public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) {
this.requiredNetworkBandwidth = requiredNetworkBandwidth;
}
public String getLabel() {
return "Process " + id;
}
@PlanningVariable(strengthComparatorClass = CloudComputerStrengthComparator.class)
@ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, solutionProperty = "computerList")
public CloudComputer getComputer() {
if (computer == null) { return null; }
return computer;
}
public void setComputer(CloudComputer computer) {
this.computer = computer;
}
public CloudProcess clone(){
CloudProcess clone = new CloudProcess();
clone.requiredCpuPower = requiredCpuPower;
clone.requiredMemory = requiredMemory;
clone.requiredNetworkBandwidth = requiredNetworkBandwidth;
clone.computer = computer;
return clone;
}
public int getRequiredMultiplicand() {
return requiredCpuPower * requiredMemory * requiredNetworkBandwidth;
}
}
--------------
this is what i'm doing to run the example:
-------------
package com.swa.planner.domain;
import java.io.ByteArrayInputStream;
import java.util.ArrayList;
import java.util.List;
import org.drools.planner.config.SolverFactory;
import org.drools.planner.config.XmlSolverFactory;
import org.drools.planner.core.Solver;
public class CloudTest {
public static void main(String[] args) {
String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<solver>"
+ " <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>"
+ " <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>"
+ " <scoreDirectorFactory>"
+ " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>"
+ " <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>"
+ " </scoreDirectorFactory>"
+ " <termination>"
+ " <maximumSecondsSpend>120</maximumSecondsSpend>"
+ " </termination>"
+ " <constructionHeuristic>"
+ " <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>"
+ " <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>"
+ " </constructionHeuristic>"
+ " <localSearch>"
+ " <planningEntityTabuSize>7</planningEntityTabuSize>"
+ " </acceptor>"
+ " <forager>"
+ " <minimalAcceptedSelection>1000</minimalAcceptedSelection>"
+ " </forager>"
+ " </localSearch>"
+ "</solver>";
byte b[] = t.getBytes();
ByteArrayInputStream bt = new ByteArrayInputStream(b);
SolverFactory solverFactory = new XmlSolverFactory().configure(bt);
Solver solver = solverFactory.buildSolver();
List<CloudComputer> computerList = new ArrayList<CloudComputer>();
computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110));
computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, 400));
computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300));
computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, 1000));
computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800));
computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, 1000));
List<CloudProcess> processList = new ArrayList<CloudProcess>();
processList.add(new CloudProcess(11L, 2, 2, 2));
processList.add(new CloudProcess(12L, 4, 4, 2));
processList.add(new CloudProcess(13L, 1, 1, 3));
processList.add(new CloudProcess(14L, 7, 3, 5));
processList.add(new CloudProcess(15L, 5, 8, 3));
processList.add(new CloudProcess(16L, 9, 2, 2));
processList.add(new CloudProcess(17L, 6, 5, 6));
CloudBalance cloudBalance = new CloudBalance();
cloudBalance.setId(0L);
cloudBalance.setComputerList(computerList);
cloudBalance.setProcessList(processList);
// Solve the problem
solver.setPlanningProblem(cloudBalance);
solver.solve();
CloudBalance solvedCloudBalance = (CloudBalance) solver.getBestSolution();
// Display the result
System.out.println("\nSolved cloudBalance with 5 computers and 6 processes:\n"
+ toDisplayString(solvedCloudBalance));
}
public static String toDisplayString(CloudBalance cloudBalance) {
StringBuilder displayString = new StringBuilder();
for (CloudProcess process : cloudBalance.getProcessList()) {
CloudComputer computer = process.getComputer();
displayString.append(" ").append(process.getLabel())
.append(" -> ")
.append(computer == null ? null : computer.getLabel())
.append("\n");
}
return displayString.toString();
}
}
-------------